JP4098582B2 - Fuel cell with cell voltage monitor - Google Patents

Fuel cell with cell voltage monitor Download PDF

Info

Publication number
JP4098582B2
JP4098582B2 JP2002243045A JP2002243045A JP4098582B2 JP 4098582 B2 JP4098582 B2 JP 4098582B2 JP 2002243045 A JP2002243045 A JP 2002243045A JP 2002243045 A JP2002243045 A JP 2002243045A JP 4098582 B2 JP4098582 B2 JP 4098582B2
Authority
JP
Japan
Prior art keywords
cell
leg
voltage monitor
shape
cell voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP2002243045A
Other languages
Japanese (ja)
Other versions
JP2004087163A (en
Inventor
晃 青砥
隆一 小宮山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Tyco Electronics Japan GK
Original Assignee
Tyco Electronics AMP KK
Toyota Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tyco Electronics AMP KK, Toyota Motor Corp filed Critical Tyco Electronics AMP KK
Priority to JP2002243045A priority Critical patent/JP4098582B2/en
Publication of JP2004087163A publication Critical patent/JP2004087163A/en
Application granted granted Critical
Publication of JP4098582B2 publication Critical patent/JP4098582B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Landscapes

  • Fuel Cell (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明はセル電圧モニターを取り付けた燃料電池（たとえば、固体高分子電解質型燃料電池などの低温型燃料電池）に関する。
【０００２】
【従来の技術】
固体高分子電解質型燃料電池は、膜−電極アッセンブリ（ＭＥＡ：Membrane-Electrode Assembly ）とセパレータとの積層体からなる。膜−電極アッセンブリは、イオン交換膜からなる電解質膜とこの電解質膜の一面に配置された触媒層からなる電極（アノード、燃料極）および電解質膜の他面に配置された触媒層からなる電極（カソード、空気極）とからなる。膜−電極アッセンブリとセパレータとの間には、アノード側、カソード側にそれぞれ拡散層が設けられる。セパレータには、アノードに燃料ガス（水素）を供給するための燃料ガス流路が形成され、カソードに酸化ガス（酸素、通常は空気）を供給するための酸化ガス流路が形成されている。また、セパレータには冷媒（通常、冷却水）を流すための冷媒流路も形成されている。膜−電極アッセンブリとセパレータを重ねてセルを構成し、少なくとも１つのセルからモジュールを構成し、モジュールを積層してセル積層体とし、セル積層体のセル積層方向両端に、ターミナル、インシュレータ、エンドプレートを配置し、セル積層体をセル積層方向に締め付け、セル積層体の外側でセル積層方向に延びる締結部材（たとえば、テンションプレート）、ボルト・ナットにて固定して、スタックを構成する。
各セルの、アノード側では、水素を水素イオン（プロトン）と電子にする反応が行われ、水素イオンは電解質膜中をカソード側に移動し、カソード側では酸素と水素イオンおよび電子（隣りのＭＥＡのアノードで生成した電子がセパレータを通してくる、またはセル積層方向一端のセルのアノードで生成した電子が外部回路を通して他端のセルのカソードにくる）から水を生成するつぎの反応が行われる。
アノード側：Ｈ2 →２Ｈ+ ＋２ｅ-
カソード側：２Ｈ+ ＋２ｅ- ＋（１／２）Ｏ2 →Ｈ2 Ｏ
各セル毎に、または複数のセル毎に、セルで正常な発電が行われていることを確認するとともに、セル電圧に基づいて反応ガスの流量制御を行ったり、異常電圧の場合にモータにガードをかけるために、セル電圧がモニタされる。
特開２００１−２５６９９１は、セル電圧モニターの、燃料電池への取付け構造および抜け止め防止構造を開示している。そこでは、カーボンセパレータに狭小部をもつ端子取付け穴を設け、端子に狭小部より大のかえし部を設け、かえし部が狭小部を越える位置まで端子を端子取付け穴に挿入して、弾性復帰したかえし部を狭小部と係合させ、抜け止めをはかるようになっている。
【０００３】
【発明が解決しようとする課題】
しかし、従来のセル電圧モニターの燃料電池への取付け構造には、つぎの課題がある。
メタルセパレータの場合はその厚さが薄く、従来構造のように端子取付け穴をセパレータ内部に形成することができないため、従来構造を適用できない。
また、メタルセパレータの引っ掛け部を作っても薄くて剛性が小さいため、端子を引っ掛けた時にセパレータが変形するおそれがあり、抜け止めの信頼性が低い。
本発明の目的は、メタルセパレータをもつ燃料電池へのセル電圧モニター取付けに適用でき、かつ抜け止めに対する信頼性の高い、セル電圧モニターを取り付けた燃料電池を提供することにある。
【０００４】
【課題を解決するための手段】
上記目的を達成する本発明はつぎの通りである。
（１） 金属板にてガス流路部を形成するとともに前記金属板の外周部上に樹脂フレームを有するセパレータを備えた燃料電池と、該燃料電池に取り付けられたセル電圧モニターとを有するセル電圧モニターを取り付けた燃料電池であって、前記樹脂フレームに互いに別の第１の溝と第２の溝を設け、前記金属板のうち該樹脂フレームの前記第２の溝に対応する部位を露出させ、前記セル電圧モニターの前記金属板とのコンタクト部を前記金属板の前記露出させた部位に設け、前記セル電圧モニターに突出する爪を設け、前記樹脂フレームの前記第１の溝の縁部に前記セル電圧モニターの爪と係合する爪係合凹部を設け、前記爪と爪係合凹部とから前記セル電圧モニターの前記燃料電池からの抜け止め部を構成したセル電圧モニターを取り付けた燃料電池。
（２） 前記コンタクト部と前記抜け止め部を互いに別の溝に設けた（１）記載のセル電圧モニターを取り付けた燃料電池。
（３） 前記セル電圧モニターを燃料電池スタックの側面に配置した（１）記載のセル電圧モニターを取り付けた燃料電池。
（４） 前記セル電圧モニターがハウジングと端子を有し、
前記ハウジングは、Ｆ字状部材からなり、Ｆ字における柱と、該柱の先端から該柱に直交方向に延びるＦ字における第１の脚と、該柱の中間部から該柱に直交方向に延びるＦ字における第２の脚とを有し、前記爪は該Ｆ字における第１の脚に形成されており、
前記端子は、Ｌ字状部材からなり、Ｌ字における第１の脚と、Ｌ字における第２の脚と、Ｌ字における折れ曲がり部とを有し、前記端子は、前記Ｌ字における第１の脚で導線に連結され、前記Ｌ字における第２の脚に前記コンタクト部を有し、前記端子の前記Ｌ字における第２の脚は前記ハウジングの前記Ｆ字における第２の脚と対応しており、
前記端子のＬ字における第１の脚はスタックのセル積層方向と直交する方向に延び、前記端子のＬ字における第２の脚にスリットが形成されており、該スリットは前記端子のＬ字における第２の脚の伸長方向中間部でスタックのセル積層方向側部に前記端子のＬ字における第１の脚と平行に形成されている（１）記載のセル電圧モニターを取り付けた燃料電池。
【０００５】
上記（１）のセル電圧モニターを取り付けた燃料電池では、樹脂フレームに抜け止め部を設けたので、セパレータ金属板が薄くても、抜け止め部は剛性が高く信頼性が高い。
上記（２）のセル電圧モニターを取り付けた燃料電池では、コンタクト部と抜け止め部を別の位置に設けたので、抜け止め部の高い剛性および大きな強度と、コンタクト部の良好な導電性とを、両立させることができる。同じ位置に設けると、どちらかが他方の犠牲になる。
上記（３）のセル電圧モニターを取り付けた燃料電池では、セル電圧モニターを燃料電池スタックの側面に配置したので、スタックの高さが限られた場合でも本取付け構造は有効であり、搭載自由度が高い。
上記（４）のセル電圧モニターを取り付けた燃料電池では、端子にスリットを設けたので、セル積層方向バラツキ、熱膨張収縮によるセルピッチバラツキを、端子自身のスリットによる首振りにて補うことができる。
【０００６】
【発明の実施の形態】
以下に、本発明のセル電圧モニターを取り付けた燃料電池を図１〜図７を参照して説明する。
本発明の燃料電池は低温型燃料電池であり、たとえば固体高分子電解質型燃料電池１０である。該燃料電池１０は、たとえば燃料電池自動車に搭載される。ただし、自動車以外に用いられてもよい。
【０００７】
固体高分子電解質型燃料電池１０は、図６、図７に示すように、膜−電極アッセンブリ（ＭＥＡ：Membrane-Electrode Assembly ）とセパレータ１８との積層体からなる。膜−電極アッセンブリは、イオン交換膜からなる電解質膜１１と、この電解質膜の一面に配置された触媒層１２からなる電極（アノード、燃料極）１４および電解質膜１１の他面に配置された触媒層１５からなる電極（カソード、空気極）１７とからなる。膜−電極アッセンブリとセパレータ１８との間には、アノード側、カソード側にそれぞれ拡散層１３、１６が設けられる。
膜−電極アッセンブリとセパレータ１８を重ねてセル１９を構成し、少なくとも１つのセルからモジュールを構成し、モジュールを積層してセル積層体とし、セル積層体のセル積層方向両端に、ターミナル２０、インシュレータ２１、エンドプレート２２を配置し、セル積層体をセル積層方向に締め付け、セル積層体の外側でセル積層方向に延びる締結部材（たとえば、テンションプレート２４）、ボルト・ナット２５にて固定して、スタック２３を構成する。
【０００８】
セパレータ１８には、アノード１４に燃料ガス（水素）を供給するための燃料ガス流路２７が形成され、カソード１７に酸化ガス（酸素、通常は空気）を供給するための酸化ガス流路２８が形成されている。また、セパレータ１８には冷媒（通常、冷却水）を流すための冷媒流路２６も形成されている。冷媒流路２６はセル１９毎に、または複数のセル１９毎に（たとえば、モジュール毎に）設けられている。
セパレータ１８は、中央部にガス流路２７、２８部を形成する金属板２９と、外周部に設けられる樹脂フレーム３０と、を有する合成セパレータである。プラス側の金属板とマイナス側の金属板との間にＭＥＡが挟まれ、中央部では金属板２９のＭＥＡ側にガス流路２７、２８が形成され、周囲部ではプラス側の金属板とマイナス側の金属板との間に電解質膜１１が挟まれる。金属板２９同士の間、樹脂フレーム３０と金属板２９との間、金属板２９と電解質膜１１との間は接着剤にてシールされる。
樹脂フレーム３０は、金属板２９よりも厚さが大で、金属板２９よりも剛性、強度が大である。
【０００９】
電解質膜１１を挟んで対峙するプラス側の金属板とマイナス側の金属板との間には電位差があり、その電位差は約１ボルトである。１つのセル１９のプラス側の金属板２９と、隣りのセル１９のマイナス側の金属板２９とは中央部で接触していて、電位差はない。
【００１０】
各セル１９毎に、あるいは複数のセル１９毎に、セル電圧モニター３１が取付けられる。
セル電圧モニター３１は、ハウジング３３と、ハウジング３３に保持される１以上の端子３２と、を有する。セル電圧モニター３１の極数は、そのセル電圧モニター３１のハウジング３３に保持される端子３２の数と等しい。たとえば、図４は極数が２のセル電圧モニター３１がスタック２３に取り付けられた場合を示している。
端子３２は導電性で金属製（金属メッキのものを含む）であり、ハウジング３３は非導電性でたとえば樹脂製である。
【００１１】
各セル電圧モニター３１の各端子３２は、セル１９の同極（プラスならプラス、マイナスならマイナス）の金属板２９に接触されてそのセル１９の電位を検出する。たとえば、一つの端子３２が一つのセル１９のプラス極の金属板２９に接触されると、隣りの端子３２は隣りのセル１９のプラス極の金属板２９に接触される。そのため、隣接する端子３２間には少なくとも１セルの厚さ分の間隔があり、端子３２同士の干渉を生じることなく、複数の端子３２をセル積層方向に並べて配置することができる。
【００１２】
図１に示すように、金属板２９にてガス流路部を形成するとともに外周部に樹脂フレーム３０を有する燃料電池１０にセル電圧モニター３１を取付ける構造において、セル電圧モニター３１の、金属板２９とのコンタクト部３４が、金属板２９部位に設けられており、セル電圧モニター３１の燃料電池からの抜け止め部３５が、樹脂フレーム３０部位に設けられている。
セル電圧モニター３１の、金属板２９とのコンタクト部３４と、セル電圧モニター３１の燃料電池からの抜け止め部３５とは、互いに別の位置に設けられている。
【００１３】
セル電圧モニター３１の、燃料電池スタック２３への取付け構造を、さらに詳しく説明する。
図１に示すように、スタック２３のうちセル電圧モニター３１が取付けられる部位には、樹脂フレーム３０に第１の溝３０ａと第２の溝３０ｂが形成されている。第１の溝３０ａと第２の溝３０ｂとは別位置に形成されており互いに平行である。プラス極の金属板２９とマイナス極の金属板２９とのうち何れか一方の金属板２９に端子３１が接触される。端子３１が接触される方の金属板２９には、樹脂フレーム３０の第１の溝３０ａのみと位置、形状を対応させて狭幅の溝２９ａが形成されており、端子３１が接触されない方の金属板２９には、樹脂フレーム３０の第１の溝３０ａと第２の溝３０ｂの両方にわたる広幅の溝２９ｂが形成されている。
【００１４】
図１、図３に示すように、端子３２は、導線３６に接続されている。端子３２は、側面視でＬ字状のＬ字状部材からなり、Ｌ字の第１の脚３２ａと、Ｌ字の第２の脚３２ｂと、Ｌ字の折れ曲がり部３２ｃとを有する。端子３２は、第１の脚３２ａでかしめによって導線３６に連結される。端子３２の第２の脚３２ｂは折れ曲がり部３２ｃと反対側の端部に一対のアーム３２ｄを有し、一対のアーム３２ｄ間にセパレータの金属板２９を挟んで金属板２９と接触し、金属板２９とのコンタクト部（電気的接触部）３４を構成している。
【００１５】
図１に示すように、ハウジング３３は、側面視でＦ字状のＦ字状部材からなり、Ｆ字の柱３３ａと、柱３３ａの先端３３ｄから柱３３ａと直交方向に延びる第１の脚３３ｂと、柱３３ａの中間部３３ｅから柱３３ａと直交方向に延びる第２の脚３３ｃとを有する。
セル電圧モニター３１がスタック２３に取付けられた時には、ハウジング３３の第１の脚３３ｂは樹脂フレーム３０に第１の溝３０ａと金属板２９の溝２９ａに突入し、ハウジング３３の第２の脚３３ｃは樹脂フレーム３０に第２の溝３０ｂと金属板２９の溝２９ｂに突入する。
【００１６】
ハウジング３３の柱３３ａの、先端３３ｄと反対側の端部３３ｆから中間部３３ｅまでの間の部分、および第２の脚３３ｃとは、端子３２を保持する端子保持部３３ｇを構成する。端子３２を端子保持部３３ｇに挿入後ハウジング３３の蓋３３ｈを閉じて端子３２が端子保持部３３ｇから抜け出ないようにする。
また、ハウジング３３の第１の脚３３ｂには、第２の脚３３ｃに対向する側と反対側の面に該面から突出する爪３３ｉが形成されている。爪３３ｉは、樹脂フレーム３０の第１の溝３０ａの、爪対応部に形成された爪係合凹部３０ｃに入り、爪係合凹部３０ｃと係合し、爪３３ｉと爪係合凹部３０ｃはセル電圧モニター３１の燃料電池からの抜け止め部３５を構成している。
金属板２９の溝２９ａ、２９ｂの、ハウジング３３の第１の脚３３ｂに対向する縁部は、樹脂フレーム３０の第１の溝３０ａの、ハウジング３３の第１の脚３３ｂに対向する縁部よりも、第１の脚３３ｂから離れていて爪３３ｉと当たらず、爪３３ｉが爪係合凹部３０ｃに入ることを阻害しない。
【００１７】
燃料電池スタック２３が、セル積層方向を水平方向に向けて車両に搭載される場合、図５に示すように、セル電圧モニター３１は燃料電池スタック２３の側面に配置されることが望ましい。ただし、スタック２３の上面または下面に配置されてもよい。
【００１８】
セル電圧モニター３１の端子３２にはスリット３７が形成されている。スリット３７は、端子３２のＬ字の折れ曲がり部３２ｃと一対のアーム３２ｄとの間の部分に形成されている。スリット３７は第１の脚３２ａに平行な面内に切られていて、スリット３７よりも第１の脚３２ａ側の部分を一対のアーム３２ｄがある部分に対して、スタック２３のセル積層方向に、首振り可能にする。
【００１９】
つぎに、本発明のセル電圧モニターを取り付けた燃料電池の作用を説明する。
端子３２の一対のアーム３２ｄでセパレータの金属板２９を挟むようにしたので、セパレータに穴を設けてそこに端子を挿入する構成に比べて、コンタクト部３４の強度、信頼性を高めることができる。
樹脂フレーム３０にセル電圧モニター３１の抜け外れを防止する抜け止め部３５を設けたので、セパレータ金属板２９が薄くても、抜け止め部３５は剛性が高く抜け止めの信頼性が高い。
【００２０】
また、コンタクト部３４と抜け止め部３５を別の位置に設けたので、樹脂フレーム３０の方に強度部材の役割をもたせ、セパレータ金属板２９の方は導電性、熱伝導性の役割をもたせ強度部材としての役割をもたせないで済む。その結果、抜け止め部３５の高い剛性および大きな強度と、コンタクト部３４の良好な導電性とを、両立させることができる。コンタクト部と抜け止め部を同じ位置に設けると、どちらかが他方の犠牲になるが、それを防止することができる。
【００２１】
また、セル電圧モニター３１を、セル積層方向を水平方向に向けて車両に搭載される燃料電池スタック２３の側面に配置した場合には、スタック２３の高さが限られた場合でも本発明のセル電圧モニター３１のスタック２３への取付け構造は有効であり、搭載自由度が高い。
また、端子３２にスリット３７を設けたので、セル積層方向バラツキ、熱膨張収縮によるセルピッチバラツキを、端子３２自身の、スリット３７による、セル積層方向の首振りにて吸収することができる。
【００２２】
【発明の効果】
請求項１のセル電圧モニターを取り付けた燃料電池によれば、樹脂フレームに抜け止め部を設けたので、抜け止め部は剛性が高く信頼性が高い。
請求項２のセル電圧モニターを取り付けた燃料電池によれば、コンタクト部と抜け止め部を別の位置に設けたので、抜け止め部の高い剛性および大きな強度と、コンタクト部の良好な導電性とを、両立させることができる。
請求項３のセル電圧モニターを取り付けた燃料電池によれば、セル電圧モニターを燃料電池スタックの側面に配置したので、スタックの高さが限られた場合でも本発明の取付け構造は有効であり、搭載自由度が高い。
請求項４のセル電圧モニターを取り付けた燃料電池によれば、端子にスリットを設けたので、セル積層方向バラツキ、熱膨張収縮によるセルピッチバラツキを、端子自身のスリットによる首振りにて吸収することができる。
【図面の簡単な説明】
【図１】 本発明の一実施例に係るセル電圧モニターを取り付けた燃料電池のセル電圧モニター取付け部分の側面図である。
【図２】 図１のうちセル電圧モニターの、図１におけるＡ方向視図である。
【図３】 図１のうちセル電圧モニターの、端子のみの斜視図である。
【図４】 図１のセル電圧モニターの燃料電池への取付け部分の斜視図である。
【図５】 図１で、セル電圧モニターが燃料電池スタックの側面に取付けられた場合の、セル積層方向に見た正面図である。
【図６】 燃料電池スタックの、セル積層方向と直交する方向から見た、側面図である。
【図７】 燃料電池スタックの単セルの一部分の断面図である。
【符号の説明】
１０ （固体高分子電解質型）燃料電池
１１ 電解質膜
１２、１５ 触媒層
１３、１６ 拡散層
１４ 電極（アノード、燃料極）
１７ 電極（カソード、空気極）
１８ セパレータ
１９ セル
２０ ターミナル
２１ インシュレータ
２２ エンドプレート
２３ スタック
２４ 締結部材（テンションプレート）
２５ ボルト
２６ 冷媒流路（冷却水流路）
２７ 燃料ガス流路
２８ 酸化ガス流路
２９ 金属板
２９ａ、２９ｂ 溝
３０ 樹脂フレーム
３０ａ 第１の溝
３０ｂ 第２の溝
３０ｃ 爪係合凹部
３１ セル電圧モニター
３２ 端子
３２ａ 第１の脚
３２ｂ 第２の脚
３２ｃ 折れ曲がり部
３２ｄ 一対のアーム
３３ ハウジング
３３ａ 柱
３３ｂ 第１の脚
３３ｃ 第２の脚
３３ｄ 先端
３３ｅ 中間部
３３ｆ 反対側端部
３３ｇ 端子保持部
３３ｈ 蓋
３３ｉ 爪
３４ コンタクト部
３５ 抜け止め部
３６ 導線
３７ スリット[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fuel cell fitted with a cell voltage monitor (e.g., low-temperature fuel cells such as solid polymer electrolyte fuel cell).
[0002]
[Prior art]
A solid polymer electrolyte fuel cell includes a laminate of a membrane-electrode assembly (MEA) and a separator. The membrane-electrode assembly includes an electrolyte membrane composed of an ion exchange membrane, an electrode composed of a catalyst layer disposed on one surface of the electrolyte membrane (anode, fuel electrode), and an electrode composed of a catalyst layer disposed on the other surface of the electrolyte membrane ( Cathode, air electrode). Between the membrane-electrode assembly and the separator, diffusion layers are provided on the anode side and the cathode side, respectively. In the separator, a fuel gas passage for supplying fuel gas (hydrogen) to the anode is formed, and an oxidizing gas passage for supplying oxidizing gas (oxygen, usually air) to the cathode. The separator is also formed with a refrigerant flow path for flowing a refrigerant (usually cooling water). A cell is formed by stacking a membrane-electrode assembly and a separator, a module is formed from at least one cell, a module is stacked to form a cell stack, and terminals, insulators, end plates are formed at both ends of the cell stack in the cell stacking direction. The cell stack is clamped in the cell stacking direction, and fixed by fastening members (for example, tension plates), bolts, and nuts extending in the cell stacking direction outside the cell stack.
In each cell, a reaction for converting hydrogen into hydrogen ions (protons) and electrons is performed on the anode side, and the hydrogen ions move through the electrolyte membrane to the cathode side. On the cathode side, oxygen, hydrogen ions, and electrons (neighboring MEA) Next, the following reaction is performed to generate water from electrons generated at the anode of the first electrode through the separator or electrons generated at the anode of the cell at one end in the cell stacking direction through the external circuit to the cathode of the other cell.
Anode side: H 2 → 2H + + 2e −
Cathode side: 2H + + 2e − + (1/2) O 2 → H 2 O
Confirm that normal power generation is performed in each cell or every multiple cells, control the flow rate of the reaction gas based on the cell voltage, and guard the motor in case of abnormal voltage In order to apply, the cell voltage is monitored.
Japanese Patent Application Laid-Open No. 2001-256991 discloses a structure for attaching a cell voltage monitor to a fuel cell and a structure for preventing the cell voltage monitor from coming off. There, the carbon separator was provided with a terminal mounting hole with a narrow portion, the terminal was provided with a barbed portion larger than the narrow portion, and the terminal was inserted into the terminal mounting hole until the barbed portion exceeded the narrow portion, and returned elastically. The barbed portion is engaged with the narrow portion so as to prevent it from coming off.
[0003]
[Problems to be solved by the invention]
However, the conventional structure for attaching the cell voltage monitor to the fuel cell has the following problems.
In the case of a metal separator, the thickness is thin, and the terminal mounting hole cannot be formed inside the separator as in the conventional structure, so that the conventional structure cannot be applied.
Moreover, even if the hook portion of the metal separator is made, the metal separator is thin and has low rigidity. Therefore, the separator may be deformed when the terminal is hooked, and the reliability of retaining is low.
An object of the present invention is to provide a fuel cell having high reliability, fitted with a cell voltage monitor for application can, and retaining the cell voltage monitor attached to the fuel cell with a metal separator.
[0004]
[Means for Solving the Problems]
The present invention for achieving the above object is as follows.
(1) A cell voltage comprising a fuel cell having a gas flow path portion formed of a metal plate and having a separator having a resin frame on the outer periphery of the metal plate, and a cell voltage monitor attached to the fuel cell. a fuel cell fitted with monitors, the mutually resin frame provided another first and second grooves, to expose the portion corresponding to the second groove of the resin frame of said metal plate A contact portion with the metal plate of the cell voltage monitor is provided at the exposed portion of the metal plate, a claw protruding to the cell voltage monitor is provided, and an edge of the first groove of the resin frame is provided. A claw engaging recess that engages with the claw of the cell voltage monitor is provided, and a cell voltage monitor that constitutes a retaining portion from the fuel cell of the cell voltage monitor is attached from the claw and the claw engaging recess. Fuel cell.
(2) A fuel cell equipped with the cell voltage monitor according to (1), wherein the contact portion and the retaining portion are provided in different grooves .
(3) A fuel cell equipped with the cell voltage monitor according to (1), wherein the cell voltage monitor is disposed on a side surface of the fuel cell stack.
(4) the cell voltage monitor has a housing and a terminal;
The housing includes an F-shaped member, a column in the F-shape, a first leg in an F-shape extending in a direction orthogonal to the column from the tip of the column, and a direction perpendicular to the column from an intermediate portion of the column A second leg in the F-shape, and the claw is formed on the first leg in the F-shape,
The terminal is formed of an L-shaped member, and includes a first leg in the L shape, a second leg in the L shape, and a bent portion in the L shape, and the terminal includes a first leg in the L shape. A leg is connected to the conductor, the second leg in the L-shape has the contact portion, and the second leg in the L-shape of the terminal corresponds to the second leg in the F-shape of the housing And
The first leg of the L-shape of the terminal extends in a direction perpendicular to the cell stacking direction of the stack, and a slit is formed in the second leg of the L-shape of the terminal, the slit in the L-shape of the terminal A fuel cell comprising the cell voltage monitor according to (1), wherein the cell voltage monitor according to (1), which is formed in parallel with the first leg of the L-shape of the terminal at a cell stacking direction side portion of the stack at an intermediate portion in the extension direction of the second leg.
[0005]
In the fuel cell equipped with the cell voltage monitor of (1) above, the retaining portion is provided in the resin frame. Therefore, even if the separator metal plate is thin, the retaining portion has high rigidity and high reliability.
In the fuel cell equipped with the cell voltage monitor of (2) above, the contact part and the retaining part are provided at different positions, so that the rigidity and large strength of the retaining part and the good conductivity of the contact part are achieved. , Can be compatible. If they are placed in the same position, one will sacrifice the other.
In the fuel cell with the cell voltage monitor of (3) above, the cell voltage monitor is arranged on the side of the fuel cell stack, so this mounting structure is effective even when the stack height is limited, and the degree of freedom of mounting. Is expensive.
In the fuel cell with the cell voltage monitor of (4) above, since the slit is provided in the terminal, the cell stacking direction variation and the cell pitch variation due to thermal expansion and contraction can be compensated by swinging the terminal itself with the slit. .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
A fuel cell equipped with the cell voltage monitor of the present invention will be described below with reference to FIGS.
The fuel cell of the present invention is a low temperature fuel cell, for example, a solid polymer electrolyte fuel cell 10. The fuel cell 10 is mounted on, for example, a fuel cell vehicle. However, it may be used other than an automobile.
[0007]
As shown in FIGS. 6 and 7, the solid polymer electrolyte fuel cell 10 is composed of a laminate of a membrane-electrode assembly (MEA) and a separator 18. The membrane-electrode assembly includes an electrolyte membrane 11 made of an ion exchange membrane, an electrode (anode, fuel electrode) 14 made of a catalyst layer 12 placed on one surface of the electrolyte membrane, and a catalyst placed on the other surface of the electrolyte membrane 11. An electrode (cathode, air electrode) 17 composed of the layer 15 is formed. Between the membrane-electrode assembly and the separator 18, diffusion layers 13 and 16 are provided on the anode side and the cathode side, respectively.
The membrane-electrode assembly and the separator 18 are overlapped to form a cell 19, a module is formed from at least one cell, the modules are stacked to form a cell stack, and terminals 20 and insulators are formed at both ends of the cell stack in the cell stacking direction. 21, end plate 22 is arranged, the cell stack is clamped in the cell stacking direction, and is fixed with a fastening member (for example, tension plate 24) extending in the cell stacking direction outside the cell stack, bolts and nuts 25, The stack 23 is configured.
[0008]
The separator 18 is formed with a fuel gas flow path 27 for supplying fuel gas (hydrogen) to the anode 14 and an oxidizing gas flow path 28 for supplying oxidizing gas (oxygen, usually air) to the cathode 17. Is formed. The separator 18 is also formed with a refrigerant flow path 26 for flowing a refrigerant (usually cooling water). The refrigerant flow path 26 is provided for each cell 19 or for each of the plurality of cells 19 (for example, for each module).
The separator 18 is a synthetic separator having a metal plate 29 that forms gas flow passages 27 and 28 in the central portion, and a resin frame 30 provided on the outer peripheral portion. The MEA is sandwiched between the plus side metal plate and the minus side metal plate, the gas flow paths 27 and 28 are formed on the MEA side of the metal plate 29 at the center portion, and the plus side metal plate and the minus side metal plate at the peripheral portion. The electrolyte membrane 11 is sandwiched between the metal plate on the side. The metal plates 29, the resin frame 30 and the metal plate 29, and the metal plate 29 and the electrolyte membrane 11 are sealed with an adhesive.
The resin frame 30 is thicker than the metal plate 29, and has higher rigidity and strength than the metal plate 29.
[0009]
There is a potential difference between the plus side metal plate and the minus side metal plate facing each other with the electrolyte membrane 11 interposed therebetween, and the potential difference is about 1 volt. The plus side metal plate 29 of one cell 19 and the minus side metal plate 29 of the adjacent cell 19 are in contact at the center, and there is no potential difference.
[0010]
A cell voltage monitor 31 is attached for each cell 19 or for each of a plurality of cells 19.
The cell voltage monitor 31 includes a housing 33 and one or more terminals 32 held by the housing 33. The number of poles of the cell voltage monitor 31 is equal to the number of terminals 32 held in the housing 33 of the cell voltage monitor 31. For example, FIG. 4 shows a case where a cell voltage monitor 31 having two poles is attached to the stack 23.
The terminal 32 is conductive and made of metal (including a metal-plated one), and the housing 33 is non-conductive and made of, for example, resin.
[0011]
Each terminal 32 of each cell voltage monitor 31 is in contact with a metal plate 29 of the same polarity (positive if positive, negative if negative) of the cell 19 to detect the potential of the cell 19. For example, when one terminal 32 is in contact with the positive electrode metal plate 29 of one cell 19, the adjacent terminal 32 is in contact with the positive electrode metal plate 29 of the adjacent cell 19. Therefore, there is an interval of at least one cell thickness between adjacent terminals 32, and a plurality of terminals 32 can be arranged in the cell stacking direction without causing interference between the terminals 32.
[0012]
As shown in FIG. 1, in a structure in which a gas flow path portion is formed by a metal plate 29 and a cell voltage monitor 31 is attached to a fuel cell 10 having a resin frame 30 on the outer peripheral portion, the metal plate 29 of the cell voltage monitor 31 The contact portion 34 is provided at the metal plate 29 portion, and the retaining portion 35 from the fuel cell of the cell voltage monitor 31 is provided at the resin frame 30 portion.
The contact portion 34 of the cell voltage monitor 31 with the metal plate 29 and the retaining portion 35 of the cell voltage monitor 31 from the fuel cell are provided at different positions.
[0013]
The structure for attaching the cell voltage monitor 31 to the fuel cell stack 23 will be described in more detail.
As shown in FIG. 1, a first groove 30 a and a second groove 30 b are formed in the resin frame 30 at a portion of the stack 23 where the cell voltage monitor 31 is attached. The first groove 30a and the second groove 30b are formed at different positions and are parallel to each other. The terminal 31 is in contact with one of the positive electrode metal plate 29 and the negative electrode metal plate 29. The metal plate 29 that is in contact with the terminal 31 is formed with a narrow groove 29a corresponding to the position and shape of only the first groove 30a of the resin frame 30, and the terminal 31 is not in contact with the metal plate 29. The metal plate 29 is formed with a wide groove 29b extending over both the first groove 30a and the second groove 30b of the resin frame 30.
[0014]
As shown in FIGS. 1 and 3, the terminal 32 is connected to a conducting wire 36. The terminal 32 is made of an L-shaped member that is L-shaped in a side view, and includes an L-shaped first leg 32a, an L-shaped second leg 32b, and an L-shaped bent portion 32c. The terminal 32 is connected to the conducting wire 36 by caulking with the first leg 32a. The second leg 32b of the terminal 32 has a pair of arms 32d at the end opposite to the bent portion 32c, and contacts the metal plate 29 with the metal plate 29 of the separator sandwiched between the pair of arms 32d. The contact part (electric contact part) 34 with 29 is comprised.
[0015]
As shown in FIG. 1, the housing 33 includes an F-shaped member having an F shape in a side view, and an F-shaped column 33 a and a first leg 33 b extending from the tip 33 d of the column 33 a in a direction orthogonal to the column 33 a. And a second leg 33c extending from the intermediate portion 33e of the column 33a in a direction orthogonal to the column 33a.
When the cell voltage monitor 31 is attached to the stack 23, the first leg 33 b of the housing 33 enters the resin frame 30 into the first groove 30 a and the groove 29 a of the metal plate 29, and the second leg 33 c of the housing 33. Enters the resin frame 30 into the second groove 30 b and the groove 29 b of the metal plate 29.
[0016]
The portion of the column 33a of the housing 33 between the end portion 33f opposite to the tip 33d and the intermediate portion 33e, and the second leg 33c constitute a terminal holding portion 33g for holding the terminal 32. After the terminal 32 is inserted into the terminal holding part 33g, the cover 33h of the housing 33 is closed to prevent the terminal 32 from coming out of the terminal holding part 33g.
Further, the first leg 33b of the housing 33 is formed with a claw 33i protruding from the surface opposite to the side facing the second leg 33c. The claw 33i enters the claw engagement recess 30c formed in the claw corresponding portion of the first groove 30a of the resin frame 30, engages with the claw engagement recess 30c, and the claw 33i and the claw engagement recess 30c The voltage monitor 31 constitutes a retaining portion 35 from the fuel cell.
Edges of the grooves 29a and 29b of the metal plate 29 facing the first legs 33b of the housing 33 are more than edges of the first grooves 30a of the resin frame 30 facing the first legs 33b of the housing 33. However, it is separated from the first leg 33b and does not hit the claw 33i, and does not hinder the claw 33i from entering the claw engaging recess 30c.
[0017]
When the fuel cell stack 23 is mounted on a vehicle with the cell stacking direction oriented in the horizontal direction, the cell voltage monitor 31 is preferably disposed on the side surface of the fuel cell stack 23 as shown in FIG. However, it may be disposed on the upper surface or the lower surface of the stack 23.
[0018]
A slit 37 is formed in the terminal 32 of the cell voltage monitor 31. The slit 37 is formed in a portion between the L-shaped bent portion 32c of the terminal 32 and the pair of arms 32d. The slit 37 is cut in a plane parallel to the first leg 32a, and a portion closer to the first leg 32a than the slit 37 is located in the cell stacking direction of the stack 23 with respect to a portion where the pair of arms 32d is present. Enable swinging.
[0019]
Next, the operation of the fuel cell fitted with a cell voltage monitor of the present invention.
Since the separator metal plate 29 is sandwiched between the pair of arms 32d of the terminal 32, the strength and reliability of the contact portion 34 can be improved as compared with the configuration in which a hole is provided in the separator and the terminal is inserted therein. .
Since the resin frame 30 is provided with the retaining portion 35 that prevents the cell voltage monitor 31 from coming off, even if the separator metal plate 29 is thin, the retaining portion 35 has high rigidity and high reliability.
[0020]
Further, since the contact portion 34 and the retaining portion 35 are provided at different positions, the resin frame 30 has a role of a strength member, and the separator metal plate 29 has a role of conductivity and heat conductivity. It is not necessary to have a role as a member. As a result, it is possible to achieve both high rigidity and high strength of the retaining portion 35 and good conductivity of the contact portion 34. If the contact portion and the retaining portion are provided at the same position, either one is sacrificed on the other, but this can be prevented.
[0021]
In addition, when the cell voltage monitor 31 is arranged on the side surface of the fuel cell stack 23 mounted on the vehicle with the cell stacking direction oriented horizontally, the cell of the present invention can be used even when the height of the stack 23 is limited. The structure for attaching the voltage monitor 31 to the stack 23 is effective and has a high degree of freedom in mounting.
Further, since the slit 37 is provided in the terminal 32, the cell stacking direction variation and the cell pitch variation due to thermal expansion and contraction can be absorbed by the swing of the terminal 32 itself by the slit 37 in the cell stacking direction.
[0022]
【The invention's effect】
According to the fuel cell to which the cell voltage monitor according to the first aspect is attached, the retaining portion is provided in the resin frame, so that the retaining portion has high rigidity and high reliability.
According to the fuel cell to which the cell voltage monitor according to claim 2 is attached , since the contact portion and the retaining portion are provided at different positions, high rigidity and large strength of the retaining portion, and good conductivity of the contact portion, Can be made compatible.
According to the fuel cell to which the cell voltage monitor of claim 3 is attached , since the cell voltage monitor is arranged on the side surface of the fuel cell stack, the mounting structure of the present invention is effective even when the height of the stack is limited, Mounting flexibility is high.
According to the fuel cell equipped with the cell voltage monitor of claim 4, since the slit is provided in the terminal, the cell stacking direction variation and the cell pitch variation due to thermal expansion and contraction are absorbed by the swing of the terminal itself by the swing. Can do.
[Brief description of the drawings]
FIG. 1 is a side view of a cell voltage monitor mounting portion of a fuel cell equipped with a cell voltage monitor according to an embodiment of the present invention.
2 is a view in the direction A in FIG. 1 of the cell voltage monitor in FIG. 1;
FIG. 3 is a perspective view of only the terminal of the cell voltage monitor in FIG. 1;
4 is a perspective view of a portion where the cell voltage monitor of FIG. 1 is attached to a fuel cell. FIG.
FIG. 5 is a front view in the cell stacking direction when the cell voltage monitor is attached to the side surface of the fuel cell stack in FIG. 1;
FIG. 6 is a side view of the fuel cell stack as seen from a direction orthogonal to the cell stacking direction.
FIG. 7 is a cross-sectional view of a part of a single cell of a fuel cell stack.
[Explanation of symbols]
10 (Solid Polymer Electrolyte Type) Fuel Cell 11 Electrolyte Membrane 12, 15 Catalyst Layer 13, 16 Diffusion Layer 14 Electrode (Anode, Fuel Electrode)
17 electrodes (cathode, air electrode)
18 Separator 19 Cell 20 Terminal 21 Insulator 22 End plate 23 Stack 24 Fastening member (tension plate)
25 Bolt 26 Refrigerant flow path (cooling water flow path)
27 Fuel gas channel 28 Oxidizing gas channel 29 Metal plates 29a, 29b Groove 30 Resin frame 30a First groove 30b Second groove 30c Claw engaging recess 31 Cell voltage monitor 32 Terminal 32a First leg 32b Second Leg 32c Bent part 32d A pair of arms 33 Housing 33a Column 33b First leg 33c Second leg 33d Tip 33e Intermediate part 33f Opposite end 33g Terminal holding part 33h Lid 33i Claw 34 Contact part 35 Retaining part 36 Conductor 37 slit

Claims (4)

金属板にてガス流路部を形成するとともに前記金属板の外周部上に樹脂フレームを有するセパレータを備えた燃料電池と、該燃料電池に取り付けられたセル電圧モニターとを有するセル電圧モニターを取り付けた燃料電池であって、前記樹脂フレームに互いに別の第１の溝と第２の溝を設け、前記金属板のうち該樹脂フレームの前記第２の溝に対応する部位を露出させ、前記セル電圧モニターの前記金属板とのコンタクト部を前記金属板の前記露出させた部位に設け、前記セル電圧モニターに突出する爪を設け、前記樹脂フレームの前記第１の溝の縁部に前記セル電圧モニターの爪と係合する爪係合凹部を設け、前記爪と爪係合凹部とから前記セル電圧モニターの前記燃料電池からの抜け止め部を構成したセル電圧モニターを取り付けた燃料電池。A cell voltage monitor having a gas flow path portion formed of a metal plate and having a separator having a resin frame on an outer peripheral portion of the metal plate and a cell voltage monitor attached to the fuel cell is attached. and a fuel cell, wherein each other resin frame provided another first and second grooves, to expose the portion corresponding to the second groove of the resin frame of said metal plate, said cell A contact portion with the metal plate of the voltage monitor is provided at the exposed portion of the metal plate, a claw protruding to the cell voltage monitor is provided, and the cell voltage is provided at an edge of the first groove of the resin frame. A fuel provided with a cell voltage monitor provided with a claw engaging recess for engaging with a claw of the monitor, and constituting a retaining portion from the fuel cell of the cell voltage monitor from the claw and the claw engaging recess. Pond. 前記コンタクト部と前記抜け止め部を互いに別の溝に設けた請求項１記載のセル電圧モニターを取り付けた燃料電池。2. The fuel cell with the cell voltage monitor according to claim 1, wherein the contact portion and the retaining portion are provided in different grooves . 前記セル電圧モニターを燃料電池スタックの側面に配置した請求項１記載のセル電圧モニターを取り付けた燃料電池。  The fuel cell with the cell voltage monitor attached thereto according to claim 1, wherein the cell voltage monitor is disposed on a side surface of the fuel cell stack. 前記セル電圧モニターがハウジングと端子を有し、
前記ハウジングは、Ｆ字状部材からなり、Ｆ字における柱と、該柱の先端から該柱に直交方向に延びるＦ字における第１の脚と、該柱の中間部から該柱に直交方向に延びるＦ字における第２の脚とを有し、前記爪は該Ｆ字における第１の脚に形成されており、
前記端子は、Ｌ字状部材からなり、Ｌ字における第１の脚と、Ｌ字における第２の脚と、Ｌ字における折れ曲がり部とを有し、前記端子は、前記Ｌ字における第１の脚で導線に連結され、前記Ｌ字における第２の脚に前記コンタクト部を有し、前記端子の前記Ｌ字における第２の脚は前記ハウジングの前記Ｆ字における第２の脚と対応しており、
前記端子のＬ字における第１の脚はスタックのセル積層方向と直交する方向に延び、前記端子のＬ字における第２の脚にスリットが形成されており、該スリットは前記端子のＬ字における第２の脚の伸長方向中間部でスタックのセル積層方向側部に前記端子のＬ字における第１の脚と平行に形成されている請求項１記載のセル電圧モニターを取り付けた燃料電池。The cell voltage monitor has a housing and a terminal;
The housing includes an F-shaped member, a column in the F-shape, a first leg in an F-shape extending in a direction orthogonal to the column from the tip of the column, and a direction perpendicular to the column from an intermediate portion of the column A second leg in the F-shape, and the claw is formed on the first leg in the F-shape,
The terminal is formed of an L-shaped member, and includes a first leg in the L shape, a second leg in the L shape, and a bent portion in the L shape, and the terminal includes a first leg in the L shape. A leg is connected to the conductor, the second leg in the L-shape has the contact portion, and the second leg in the L-shape of the terminal corresponds to the second leg in the F-shape of the housing And
The first leg of the L-shape of the terminal extends in a direction perpendicular to the cell stacking direction of the stack, and a slit is formed in the second leg of the L-shape of the terminal, the slit in the L-shape of the terminal The fuel cell having the cell voltage monitor attached thereto according to claim 1, wherein the cell voltage monitor is formed in parallel with the first leg of the L-shape of the terminal at a cell stacking direction side portion of the stack at an intermediate portion in the extension direction of the second leg.
JP2002243045A 2002-08-23 2002-08-23 Fuel cell with cell voltage monitor Expired - Lifetime JP4098582B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002243045A JP4098582B2 (en) 2002-08-23 2002-08-23 Fuel cell with cell voltage monitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002243045A JP4098582B2 (en) 2002-08-23 2002-08-23 Fuel cell with cell voltage monitor

Publications (2)

Publication Number Publication Date
JP2004087163A JP2004087163A (en) 2004-03-18
JP4098582B2 true JP4098582B2 (en) 2008-06-11

Family

ID=32051912

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002243045A Expired - Lifetime JP4098582B2 (en) 2002-08-23 2002-08-23 Fuel cell with cell voltage monitor

Country Status (1)

Country Link
JP (1) JP4098582B2 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI364882B (en) * 2004-10-15 2012-05-21 Tyco Electronics Corp Connector system for conductive plates
JP4708101B2 (en) * 2005-07-05 2011-06-22 本田技研工業株式会社 Fuel cell voltage detection structure
JP4967349B2 (en) * 2006-01-25 2012-07-04 トヨタ自動車株式会社 Connector for detecting voltage of fuel cell and fuel cell suitable for the connector
JP4911978B2 (en) * 2006-01-25 2012-04-04 トヨタ自動車株式会社 Fuel cell and fuel cell connector
JP5011759B2 (en) * 2006-03-07 2012-08-29 トヨタ自動車株式会社 Fuel cell with cell voltage monitor
JP2009181939A (en) * 2008-02-01 2009-08-13 Toyota Motor Corp Fuel cell
JP5248226B2 (en) * 2008-07-15 2013-07-31 アイシン精機株式会社 Connector device and stack device
JP5189464B2 (en) * 2008-11-21 2013-04-24 タイコエレクトロニクスジャパン合同会社 Electrical connector
JP5790457B2 (en) * 2011-12-06 2015-10-07 トヨタ自動車株式会社 Connector mounting structure
JP5267686B2 (en) * 2012-01-10 2013-08-21 トヨタ自動車株式会社 Connector for fuel cell voltage detection
JP5584719B2 (en) * 2012-03-08 2014-09-03 タイコエレクトロニクスジャパン合同会社 Electrical connector and fuel cell
JP5928989B2 (en) * 2013-10-30 2016-06-01 トヨタ自動車株式会社 Cell monitor connector
JP6933084B2 (en) * 2017-10-23 2021-09-08 トヨタ自動車株式会社 A combination of a fuel cell and a cell connector for detecting the voltage of the fuel cell.
JP6859934B2 (en) * 2017-11-28 2021-04-14 トヨタ自動車株式会社 Fuel cell and fuel cell
JP7070444B2 (en) * 2019-01-15 2022-05-18 トヨタ自動車株式会社 Fuel cell cell unit

Also Published As

Publication number Publication date
JP2004087163A (en) 2004-03-18

Similar Documents

Publication Publication Date Title
JP3891069B2 (en) Fuel cell separator
JP4098582B2 (en) Fuel cell with cell voltage monitor
CA2558868C (en) Solid oxide fuel cell containing separators sandwiching electrolyte electrode assemblies with proper load
JP3920018B2 (en) Fuel cell stack
US20090004523A1 (en) Fuel cell and fuel cell stack
US20060024561A1 (en) Fuel cell stack
JP4592940B2 (en) Polymer electrolyte fuel cell stack
JP4055349B2 (en) Fuel cell voltage measurement device
JP2002124285A5 (en)
JP4764772B2 (en) Fuel cell
JP2004079192A (en) Mounting structure of cell voltage monitor on fuel cell stack
JP5034273B2 (en) Fuel cell
JP4211317B2 (en) Cell voltage monitor
US7682714B2 (en) Connecting structure of a cell monitor connector to a fuel cell stack
JP3870719B2 (en) Fuel cell having connection structure of cell voltage monitoring connector to cell
JP2002358983A (en) Fuel cell stack
JP3983530B2 (en) Fuel cell stack
JP2002100392A (en) Fuel cell stack
JP2003086205A (en) Cell voltage monitor part structure of fuel cell
JP4098493B2 (en) Cell voltage monitor connector
JP4134615B2 (en) Fuel cell
JP2003297395A (en) Fuel cell
JP3788273B2 (en) Fuel cell having cell monitor mounting structure
JP4127034B2 (en) Fuel cell
JP4107002B2 (en) Fuel cell with cell voltage monitor

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050428

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A711

Effective date: 20050609

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20050609

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20070821

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20071019

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20071120

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080116

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20080311

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20080313

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110321

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110321

Year of fee payment: 3

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110321

Year of fee payment: 3

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110321

Year of fee payment: 3

R370 Written measure of declining of transfer procedure

Free format text: JAPANESE INTERMEDIATE CODE: R370

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110321

Year of fee payment: 3

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110321

Year of fee payment: 3

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120321

Year of fee payment: 4

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313117

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120321

Year of fee payment: 4

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120321

Year of fee payment: 4

R370 Written measure of declining of transfer procedure

Free format text: JAPANESE INTERMEDIATE CODE: R370

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120321

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130321

Year of fee payment: 5